A study conducted by researchers at the Korea Research Institute of Bioscience and Biotechnology's Infectious Disease Research Center has found that variations in gut microbiomes may influence susceptibility to sepsis. The research, published in the journal Nature, utilized female mouse models to analyze the impact of gut bacteria on sepsis outcomes. The study involved genetically similar mice infected with Acinetobacter baumannii, a bacterium associated with sepsis.
The researchers observed differences in survival rates among the mice, linking higher concentrations of Muribaculaceae bacteria in the gut to poorer survival outcomes. Mice with lower survival rates exhibited a stronger inflammatory response, leading to increased bacterial presence in the blood and organs. Additionally, a strain of bacteria, Sangeribacter muris KT1-3, was found to be more prevalent in the microbiomes of less resilient mice, which negatively affected their survival when housed together.
Dr. Andrew Fleming, section chief of Infectious Diseases & Immunology at NYU Langone Hospital, Brooklyn, noted that gut bacteria can release toxins into the bloodstream during sepsis, exacerbating the inflammatory response. He emphasized the importance of a diverse and healthy gut microbiome in protecting against severe sepsis and highlighted the need for further research to explore these effects in humans. The study suggests that maintaining gut health may play a role in regulating immune responses and reducing the risk of severe infections.
